Ventilation rotor



FIG. 1 is a top perspective view thereof;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front view thereof, the rear view thereof corresponding to the front view;

FIG. 4 is a first side view thereof, the second side view thereof corresponding to the first side view;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

We claim the ornamental design for a ventilation rotor, as shown and described. 